Hard coating layered optical film, polarizer comprising the same, and image display comprising the hard coating layered optical film and/or the polarizer comprising the same

ABSTRACT

The present invention is to provide a hard coating layered optical film, comprising a poly(methylmethacrylate) (PMMA) base film and a hard coating layer thereon. The hard coating layer comprises a (meth)acrylate composition and an initiator, wherein the (meth)acrylate composition comprises a urethane (meth)acrylate oligomer of functionalities from 6 to 15, at least one (meth)acrylate monomer of functionalities from 3 to 6 and at least one (meth)acrylate monomer of functionalities less than 3, wherein the molecular weight of the (meth)urethane acrylate oligomer of functionalities from 6 to 15 is ranging between 1,000 to 4,500. The hard coating layer of the hard coating layered optical film can be further coated with a functional layer, such as a low reflection layer to form an anti-reflection hard coating layered optical film. The hard coating layer can optionally comprise micro-particles to generate an anti-glare hard coating film. The anti-glare hard coating film can be further coated with a functional layer, such as a low reflection layer to form an anti-reflection anti-glare hard coating layered optical film.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwanese applicationserial No. 107126963, filed on, Aug. 2, 2018, which is incorporatedherein by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a hard coating film for display device,and particularly relates to a hard coating film with enhanced abrasionresistance, and the polarizer comprising the hard coating film, and thedisplay device comprising the hard coating film and/or the polarizer.

Description of the Prior Art

The screen surface of a display device, such as cathode ray tube display(CRT), liquid crystal display (LCD), plasma display (PDP),electroluminescent display (ELD), field emission display (FED), organiclight emitting diode display (OLED) can be scratched easily because ofuse and touch. The scratch will not only lower the image quality of thedisplay device but also deteriorate the appearance of the displayscreen.

It is suggested introducing a hard coating optical film to protect thetop surface of a display device. The hard coating optical film commonlyis a triacetyl cellulose (TAC) base film with a hard coating layerformed thereon. However, the TAC film provides a good lighttransmittance but high moisture absorption and high birefringence. Thus,it is a big challenge to the hard coating TAC film being used in GPSnavigation devices, mobile devices and the like due to the insufficientweatherability of the hard coating TAC film.

Recently, it is suggested replacing the TAC film with a polymethylmethacrylate (PMMA) film as the base film of the hard coating film inview of the good light transmittance and the weatherability of PMMA.However, because the adhesion of the acrylate hard coating compositionto the surface of PMMA film is poor, the surface of PMMA film needs tobe modified before applying to a hard coating layer, such as applyingcorona discharged treatment or oxidation treatment, coating with ananchoring agent or a primer coating. It is also suggested generating amiscible phase between the coating layer and the base film to enhancethe adhesion thereof.

The present invention is to provide a hard coating film with polymethylmethacrylate (PMMA) as base film. The hard coating film providesexcellent adhesion between the hard coating layer and the base film, agood weatherability, satisfied hardness and abrasion resistance.

SUMMARY OF THE INVENTION

The present invention is to provide a hard coating film comprising ahard coating layer disposed on a polymethyl methacrylate (PMMA) basefilm. The hard coating layer comprises a (meth)acrylate composition andan initiator, wherein the (meth)acrylate composition comprises apolyurethane (meth)acrylate oligomer with a functionality of 6 to 15, atleast one (meth)acrylate monomer with a functionality of 3 to 6, atleast one (meth)acrylate monomer with functionality of less than 3,wherein the molecular weight of the urethane (meth)acrylate oligomer isranging between 1,000 and 4,500.

In an embodiment of the hard coating film of the present invention, the(meth)acrylate composition comprises 35 to 50 weight parts of urethane(meth)acrylate oligomer with a functionality of 6 to 15, 12 to 20 weightparts of at least one (meth)acrylate monomer with a functionality of 3to 6 and 1.5 to 12 weight parts of at least one (meth)acrylate monomerwith functionality of less than 3.

In a further aspect of the present invention, the hard coating film canbe coated one or one more functional coatings, such as a low refractivecoating for forming a low refractive layer on the hard coating layer toobtain an anti-reflective hard coating film.

In an embodiment of the present invention, the low refractive layercomprises a binder resin, hollow silica nanoparticles, an initiator anda leveling agent. The reflectivity of the present hard coating film isranging between 1.2% and 1.4%.

In still a further aspect of the present invention, the hard coatinglayer can further comprises silica nanoparticles and organic microparticles to obtain an antiglare hard coating on the PMMA base film forforming an antiglare hard coating film. The antiglare hard coatingcomprising organic micro-particles and silica nanoparticles can alsoprovide an excellent adhesion to the PMMA base film. In the surface ofthe antiglare hard coating film, the mean spacing between peaks (Sm) isranging between 20 μm and 50 μm, the arithmetic mean deviation ofsurface (Ra) is ranging between 0.03 μm to 0.09 μm, the largest peak tovalley height (Ry) is ranging between 0.25 μm and 0.60 μm, the ten-pointmean roughness (Rz) is ranging between 0.15 μm and 0.50 μm and the rootmean square slope (PΔq) is ranging between 0.5° and 1.6°. The surface ofthe present antiglare hard coating film with the above roughnesscondition can provide satisfied antiglare property and abrasionresistance.

In still a further aspect of the present invention, the antiglare hardcoating can be coated one or one more functional coatings, such as a lowrefractive coating for forming a low refractive layer on the antiglarehard coating to obtain an anti-reflective antiglare hard coating film.In the surface of the this anti-reflective antiglare hard coating film,the mean spacing between peaks (Sm) is ranging between 20 μm and 90 μm,the arithmetic mean deviation of surface (Ra) is ranging between 0.03 μmand 0.07 μm, the largest peak to valley height (Ry) is ranging between0.15 μm to 0.40 μm, and the ten-point mean roughness (Rz) is rangingbetween 0.10 μm to 0.50 μm. The surface of the present anti-reflectiveantiglare hard coating film with the above roughness condition canprovide satisfied abrasion resistance.

A further object of the present invention is to provide a polarizercomprising a polarizing element, wherein the polarizer comprises thepresent hard coating film, the present anti-reflective hard coatingfilm, the present antiglare hard coating film or the presentanti-reflective antiglare hard coating film as above on the surface ofthe polarizer.

A yet further object of the present invention is to provide a displaycomprising the polarizer comprises the present hard coating film, thepresent anti-reflective hard coating film, the present antiglare hardcoating film, the present anti-reflective antiglare hard coating film,or the present polarizer thereon on the surface of the display.

The above and other aspects of the invention will become betterunderstood with regard to the following detailed description of thepreferred but non-limiting embodiment(s). These and other aspects of theinvention will become apparent from the following description of thepresently preferred embodiments. The detailed description is merelyillustrative of the invention and does not limit the scope of theinvention, which is defined by the appended claims and equivalentsthereof. As would be obvious to one skilled in the art, many variationsand modifications of the invention may be affected without departingfrom the spirit and scope of the novel concepts of the disclosure.

DETAILED DESCRIPTION OF THE INVENTION

In the following detailed description, for purposes of explanation,numerous specific details are set forth in order to provide a thoroughunderstanding of the disclosed embodiments. It will be apparent,however, that one or more embodiments may be practiced without thesespecific details.

It is apparent that departures from specific designs and methodsdescribed and shown will suggest themselves to those skilled in the artand may be used without departing from the spirit and scope of theinvention. The present invention is not restricted to the particularconstructions described and illustrated, but should be construed tocohere with all modifications that may fall within the scope of theappended claims.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention belongs. Generally, the nomenclatureused herein and the laboratory procedures are well known and commonlyemployed in the art. Conventional methods are used for these procedures,such as those provided in the art and various general references. Wherea term is provided in the singular, the inventors also contemplate theplural of that term. The nomenclature used herein and the laboratoryprocedures described below are those well-known and commonly employed inthe art.

The term “(meth)acrylate” used herein refers to acrylate ormethacrylate.

The invention is to provide a hard coating film on PMMA base film. Thehard coating film comprises a polymethyl methacrylate (PMMA) base filmand a hard coating layer thereon. The hard coating layer comprises a(meth)acrylate composition and an initiator, wherein the (meth)acrylatecomposition comprises a urethane (meth)acrylate oligomer with afunctionality of 6 to 15, at least one (meth)acrylate monomer with afunctionality of 3 to 6, at least one (meth)acrylate monomer with afunctionality of less than 3, wherein the molecular weight of theurethane (meth)acrylate oligomer is ranging between 1,000 and 4,500. Thepresent hard coating film exhibits excellent adhesion between the hardcoating layer and the PMMA base film, good weatherability, satisfiedhardness and abrasion resistance.

In an embodiment of the present invention, the light transmittance ofthe PMMA base film is more than 80% and preferably is more than 90%. Thethickness of the PMMA base film used in the present is ranging between10 μm and 100 μm, and preferably is ranging between 20 μm and 80 μm. Thethickness of the hard coating is ranging between 0.1 μm and 20 μm and ispreferably between 1.0 μm and 10 μm.

In an embodiment of the present invention, the (meth)acrylatecomposition comprises 35 to 50 weight parts of the urethane(meth)acrylate oligomer with a functionality of 6 to 15, 12 to 20 weightparts of the at least one (meth)acrylate monomer with a functionality of3 to 6, and 1.5 to 12 weight parts of the at least one (meth)acrylatemonomer with a functionality of less than 3.

In an embodiment of the present invention, the number molecular weightof the urethane (meth)acrylate oligomer with the functionality of 6 to15 is no less than 1,000 and preferably between 1,500 and 4,500. In apreferred embodiment of the present invention, the urethane(meth)acrylate oligomer with the functionality of 6 to 15 is preferablyan aliphatic urethane (meth)acrylate oligomer with the functionality of6 to 15.

In an embodiment of the present invention, the number molecular weightof the (meth)acrylate monomer with a functionality of 3 to 6 is lessthan 1,000 and preferably less than 800. The suitable (meth)acrylatemonomer with a functionality of 3 to 6 used in the present invention canbe, but not limited to, for example, selected from at least one of thegroup consisting of pentaerythritol tetra(meth)acrylate,dipentaerythritol penta(meth)acrylate (DPP(M)A), dipentaerythritolhexa(meth)acrylate (DPH(M)A), trimethylolpropane tri(meth)acrylate(TMPT(M)A), ditrimethylolpropane tetra(meth)acrylate (DTMPT(M)A),pentaerythritol tri(meth)acrylate (PET(M)A) or the combination thereof.The (meth)acrylate monomer with a functionality of 3 to 6 can be one ofpentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate(DPHA) and dipentaerythritol pentaacrylate (DPPA), or combinationsthereof.

In an embodiment of the present invention, the (meth)acrylate monomerwith functionality of less than 3 can be a (meth)acrylate monomer with afunctionality of 1 or 2 and a molecular weight of less than 500. Thesuitable (meth)acrylate monomer with functionality of less than 3 forthe present invention can be but not limited to, for example, selectedfrom at least one of the consisting of 2-ethylhexyl (meth)acrylate(2-EH(M)A), 2-hydroxyethyl (meth)acrylate (2-HE(M)A), 2-hydroxypropyl(meth)acrylate (2-HP(M)A), 2-hydroxybutyl (meth)acrylate(2-HB(M)A),2-butoxyethyl (meth)acrylate), 1,6-hexanediol di(meth)acrylate(HDD(M)A), cyclic trimethylolpropane formal (meth)acrylate (CTF(M)A),2-phenoxyethyl (meth)acrylate (PHE(M)A), tetrahydrofurfuryl(meth)acrylate (THF(M)A), lauryl (meth)acrylate (L(M)A), diethyleneglycol di(meth)acrylate (DEGD(M)A), dipropylene glycol di(meth)acrylate(DPGD(M)A), tripropylene glycol di(meth)acrylate (TPGD(M)A), isobornyl(meth)acrylate or the combination thereof. The (meth)acrylate monomerwith functionality of less than 3 can be one of 1,6-hexanedioldiacrylate (HDDA), cyclotrimethylolpropane acetal acrylate (CTFA) and2-phenoxyethyl acrylate (PHEA), or combinations thereof.

The initiator suitably used in the hard coating layer film of thepresent invention can be those commonly used in the related art, suchas, for example, but not limited to, acetophenones, diphenylketones,propiophenones, benzophenones, α-hydroxyketones, fluorenylphosphineoxides and the like. The initiator can be used alone or together.

In another embodiment of the present invention, the hard coatingsolution can be optionally added with an antistatic agent, a colorant, aflame retardant, a UV absorber, an antioxidant, a surface modifier andthe like.

In another embodiment of the present invention, the hard coating layercan be optionally coated with a low refractive solution thereon to forma low refractive layer so as to obtain an anti-reflective hard coatingfilm with a property of anti-reflection. The refractive index of the lowrefractive layer is lower than that of the base film or the hard coatinglayer. The low refractive layer on the hard coating layer can comprisesa binder resin, hollow silica nanoparticles, an initiator and a levelingagent, wherein the leveling agent comprises a perfluoropolyethergroup-containing (meth)acrylic-modified organosilicone.

The binder resin suitably used in the low refractive layer can be a(meth)acrylate, for example, but not limited to, selected from at leastone of the group consisting of pentaerythritol tri(meth)acrylate,dipentaerythritol hexa(meth)acrylate, pentaerythritoltetra(meth)acrylate, dipentaerythritol penta(meth)acrylate,trimethylolpropane tri(meth)acrylate, ditrimethylolpropanetetra(meth)acrylate and dipentaerythritol tetra(meth)acrylate, or thecombinations thereof.

The hollow silica nanoparticles in the low refractive layer are used toenhance the film strength and lower the refractivity thereof. The term“hollow silica nanoparticles” used herein is directed to a structurewith air cavities and/or a porous structure. In an embodiment of thepresent invention, the average particle diameter of the hollow silicananoparticles is ranging between 50 nm and 100 nm, and preferablyranging between 50 nm and 80 nm. The content of the hollow silicananoparticles is ranging from 60 weight parts to 130 weight partsrelative to 100 weight parts of the binder resin, and preferably rangingfrom 80 weight parts to 110 weight parts relative to 100 weight parts ofthe binder resin.

The leveling agent used in the low reflective layer is aperfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone compound represented by the following formula (I) or acompound represented by the following formula (II):

wherein b′₁+b′₂ is ranging between 2 and 6.5, and Rf′¹² is representedby the following formula:

wherein n1 is ranging between 2 and 100.

The number average molecular weight of the perfluoropolyethergroup-containing (meth)acrylic-modified organosilicone compound isranging between 1,500 and 16,000, and preferably ranging between 3,500to 7,000. The amount of the leveling agent comprising perfluoropolyethergroup-containing (meth)acrylic-modified organosilicone compound used inthe low reflective layer is ranging from 5 weight parts to 20 weightparts relative to per 100 weight parts of (meth)acrylate resin, andpreferably ranging from 8 weight parts to 17 weight parts. When thecontent of the leveling agent comprising the perfluoropolyethergroup-containing (meth)acrylic-modified organosilicone compound isexcess of insufficient, it will have adverse effect on the abrasionresistance of the anti-reflective film.

The initiator suitably used in the low reflective layer of the presentinvention can be the initiators commonly used in the related art, suchas, but not limited to, for example, selected from at least one of thegroup consisting of hydroxycyclohexy phenyl ketone,diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1phenyl propanone,2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropane-1-one, oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl] propanone] and2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropanoyl)phenoxy]phenyl]-2-methylpropan-1-one,or the combinations thereof. In an embodiment of the present invention,the amount of the initiator used in the reflective film is ranging from1.5 weight parts to 20 weight parts relative to per 100 weight parts ofthe (meth)acrylate resin, and preferably ranging from 2 weight parts to17 weight parts. When the content of initiator is excess orinsufficient, it will have adverse effect on the abrasion resistance ofthe anti-reflective film.

The hard coating film of the present invention can further be used as afunctional film. In an embodiment of the present invention, the hardcoating layer can further be incorporated into particles to be performedas an antiglare hard coating. The incorporated particles can be forexample, organic microparticles and silica nanoparticles to make anirregular rough surface for achieving an antiglare property.

In an embodiment of the present invention, the silica nanoparticlessuitable incorporated into the hard coating have a primary particlediameter (d₅₀) of 5 nm to 30 nm and a secondary particle diameter (d₅₀)of 50 nm to 120 nm. In an embodiment of the present invention, theamount of the silica nanoparticles used in the hard coating layer isranging from 0.2 weight percent (wt %) to 12 weight percent (wt %) andpreferably ranging from 0.2 weight percent (wt %) to 8 weight percent(wt %).

In an embodiment of the present invention, the particle diameter of theorganic microparticles incorporated into the antiglare hard coating isless than 5 μm and preferably ranging between 1 μm and 5 μm. Thesuitable organic microparticles are the hydrophilic-modified polymethylmethacrylate microparticles, polystyrene microparticles, styrene-methylmethacrylate copolymer microparticles, polyethylene microparticles,epoxy resin microparticles, polysilicone microparticles, polyvinylidenefluoride or polyvinyl fluoride microparticle. The surface of the organicmicroparticles can be hydrophilic-modified by 2-hydroxyethyl(meth)acrylate (2-HE(M)A) or (meth)acrylonitrile. In a preferredembodiment of the present invention, it is preferred to usehydrophilic-modified polymethyl methacrylate microparticles, polystyrenemicroparticles, or styrene-methyl methacrylate copolymer microparticles.Furthermore, the amount of the organic microparticles used in the hardcoating layer will affect the anti-glare property thereof, the amount ofthe organic microparticles used in the antiglare hard coating is rangingbetween 0.3 wt % and 2 wt % and preferably ranging between 0.7 wt % and1.8 wt %.

The present antiglare hard coating layer can optionally be incorporatedwith a re-coatable fluorine, (meth)acrylate or an organosiliconeleveling agent. The leveling agent incorporated into antiglare hardcoating layer is for enhancing the surface coverage and smoothness ofthe coating layer and thus, the surface of the low reflective layerobtained after drying can be a smooth one with antifouling and abrasionresistance. The leveling agent suitably used in the present antiglarehard coating layer can be such as, polyether-modified silicone,polyether-modified acrylate, fluorine-containing acrylate orperfluoroalkyl fluoride surfactant and the like. In an embodiment of thepresent invention, the amount of leveling agent in the coating layer isranging between 0.25 weight percent to 1.50 weight percent and ispreferably between 0.45 weight percent and 1.05 weight percent. Theamount of the leveling agent is out of the above range, the abrasionresistance of the antiglare hard coating layer will be adverselyaffected.

In an embodiment of the present invention, the hard coatingincorporating organic microparticles and silica nanoparticles can keepthe excellent adhesion between the hard coating layer and the PMMA basefilm and provide a satisfied abrasion resistance. In the surface of thepresent antiglare hard coating film, the mean spacing between peaks (Sm)is ranging between 20 μm and 50 μm, the arithmetic mean deviation ofsurface (Ra) is ranging between 0.03 μm to 0.09 μm, the largest peak tovalley height (Ry) is ranging between 0.25 μm and 0.60 μm, the ten-pointmean roughness (Rz) is ranging between 0.15 μm and 0.50 μm and the rootmean square slope (PΔq) is ranging between 0.5° and 1.6°. In the surfaceroughness of a preferred embodiment of the present antiglare hardcoating, the mean spacing between peaks (Sm) is preferably between 25 μmand 45 μm, the arithmetic mean deviation of surface (Ra) is preferablybetween 0.03 μm to 0.08 μm, the largest peak to valley height (Ry) ispreferably between 0.28 μm and 0.55 μm, the ten-point mean roughness(Rz) is preferably between 0.20 μm and 0.45 μm and the root mean squareslope (PΔq) is ranging between 0.7° and 1.4°. If the value of surfaceroughness is too low, the abrasion resistance will decrease. If thevalue of the surface roughness is higher and the slope of theconcavities and convexities in surface is too steep (higher slopeangle), the surface is susceptible to be scratched. Thus, an adequatesurface roughness can enhance the abrasion resistance of the antiglarehard coating. The present antiglare hard coating film with the adequatearithmetic mean deviation of surface, largest peak to valley roughness,ten-point mean roughness, mean spacing between peaks and root meansquare slope (slope angle) provides a satisfied abrasion resistance.

The antiglare hard coating film can be further optionally coated with anabove-mentioned low refractive layer to obtain an anti-reflectiveantiglare hard coating film. The present antiglare hard coating film iscoated with a low refractive layer to provide the anti-reflectiveproperty without lowering the abrasion resistance of the film surface.In an embodiment of the present invention, the surface roughness of theanti-reflective antiglare hard coating film has a mean spacing betweenpeaks (Sm) of between 20 μm and 90 μm, an arithmetic mean deviation ofsurface (Ra) of between 0.03 μm to 0.07 μm, a largest peak to valleyheight (Ry) of between 0.15 μm and 0.40 μm, a ten-point mean roughness(Rz) of between 0.10 μm and 0.50 μm. In a preferred embodiment of theparent invention, the surface roughness of the anti-reflective antiglarehard coating film has a mean spacing between peaks (Sm) of between 30 μmand 80 μm, an arithmetic mean deviation of surface (Ra) of between 0.035μm to 0.060 μm, a largest peak to valley height (Ry) of between 0.16 μmand 0.25 μm, a ten-point mean roughness (Rz) of between 0.20 μm and 0.40μm.

The method for preparing the hard coating film of the present inventioncomprises the steps of mixing a (meth)acrylate composition comprises aurethane (meth)acrylate oligomer with a functionality of 6 to 15, atleast one (meth)acrylate monomer with a functionality of 3 to 6, atleast one (meth)acrylate monomer with functionality of less than 3, aninitiator and adequate solvent(s) and stirred evenly for preparing ahard coating solution; optionally adding a leveling agent into the hardcoating solution; and coating the hard coating solution on the PMMA basefilm, evaporating the solvent(s) and curing by radiation or electronbeam for forming a hard coating on the PMMA base film to obtain a hardcoating film.

The present hard coating film can be further coated with a lowrefractive layer. The low refractive layer is prepared by mixing andstirring a binder resin, hollow silica nanoparticles, an initiator, aleveling agent comprising a perfluoropolyether group-containing(meth)acrylic-modified organosilicone as above and an adequatesolvent(s) to make a low refractive solution; coating the low refractivesolution on the hard coating layer, evaporating the solvent(s) andcuring the coating layer by radiation or electron beam for forming a lowrefractive layer on the hard coating layer to obtain an anti-reflectivehard coating film.

The present hard coating film can be further prepared to form anantiglare hard coating film. The method for preparing the antiglare hardcoating film comprises the steps pf mixing and stirring a (meth)acrylatecomposition comprising a urethane (meth)acrylate oligomer with afunctionality of 6 to 15, at least one (meth)acrylate monomer with afunctionality of 3 to 6, at least one (meth)acrylate monomer withfunctionality of less than 3, an initiator, a leveling agent, organicmicroparticles, silica nanoparticles and suitable solvent(s) to preparean antiglare hard coating solution; and coating the antiglare hardcoating solution on a PMMA base film, evaporating to remove thesolvent(s), radiation-curing or electron beam-curing the coating layerto form an antiglare hard coating layer on the PMMA base film to obtaina antiglare hard coating film.

The present antiglare hard coating film can be further coated with a lowrefractive layer to obtain an anti-reflective antiglare hard coatingfilm. The low refractive layer is prepared by mixing a binder resin,hollow silica nanoparticles, an initiator, a leveling agent comprising aperfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone and suitable solvent(s) to obtain a low refractivesolution; coating the low refractive solution on the antiglare hardcoating layer; and evaporating the solvent, radiation-curing or electronbeam curing the coating layer to form a low refractive layer on theantiglare hard coating film.

The solvents suitable for preparation of the present hard coating, theantiglare hard coating, the low refractive layer can be the organicsolvents commonly used in the related art, such as ketones, aliphatic,cycloaliphatic or aromatic hydrocarbons, ethers, esters or alcohols. Thehard coating solution and the low refractive solution can use one or onemore organic solvents. The suitable solvent can be such as, acetone,butanone, cyclohexanone, methyl isobutyl ketone, hexane, cyclohexane,dichloromethane, dichloroethane, toluene, xylene, propylene glycolmethyl ether, methyl acetate, ethyl acetate, propyl acetate, butylacetate, n-butanol, isobutanol, isopropanol, diacetone alcohol,propylene glycol methyl ether acetate, cyclohexanol or tetrahydrofuranand the like.

The hard coating solution, antiglare hard coating solution and the lowrefractive solution can be applied to the base film surface by any usualmethod in the related art, for example, bar coating, doctor bladecoating, dip coating, roll coating, spinning coating, slot-die coatingand the like.

The further object of the present invention is to provide a polarizercomprising a polarizing element, wherein the surface of the polarizercomprises the present hard coating film, the present anti-reflectivehard coating film, the present antiglare hard coating film or theanti-reflective antiglare hard coating film.

A yet further object of the present invention is to provide a displaycomprising the present hard coating film, the present anti-reflectivehard coating film, the present antiglare hard coating film or theanti-reflective antiglare hard coating film and/or a polarizer as aboveon the surface of the display.

The present invention will be described below with reference to Examplesto describe the present invention in detail but the present invention isnot limited to the description thereof.

Example Example 1: Preparation of the Hard Coating Film

39 weight parts of urethane acrylate oligomer (functionality 6,molecular weight of about 1,520, viscosity of 25,000 cps (at 25° C.),commercially obtained from Miwon, Korea), 4.5 weight parts of PETA, 12weight parts of DPHA, 6 weight parts of HDDA, 4 weight parts ofphotoinitiator (Chemcure-481, commercially obtained from Chembridge,Taiwan), 24.5 weight parts of ethyl acetate and 75 weight parts ofn-butyl acetate were mixed and stirred for 1 hour to prepare a hardcoating solution. The hard coating solution was coated on a PMMA basefilm with a thickness of 40 μm, and then, the coating film was dried at90° C. oven for 30 seconds and cured by exposing to UV light in acumulative dosage of 40 mJ/cm² under nitrogen atmosphere to obtain ahard coating film with a thickness of 5 μm formed on the PMMA base film.The optical properties, hardness and abrasion resistance of the obtainedhard coating film were determined and the adhesion between the hardcoating layer and the PMMA base film was also determined. The resultswere shown in table 1.

Example 2: Preparation of the Hard Coating Film

39 weight parts of urethane acrylate oligomer (functionality 15,molecular weight about 3,600, viscosity of 4,700 cps (at 60° C.,commercially obtained from Chemton, Korea), 4.5 weight parts of PETA, 12weight parts of DPHA, 6 weight parts of HDDA, 4 weight parts ofphotoinitiator (Chemcure-481, commercially obtained from Chembridge,Taiwan), 24.5 weight parts of ethyl acetate and 75 weight parts ofn-butyl acetate were mixed and stirred for 1 hour to prepare a hardcoating solution. The hard coating solution was coated on a PMMA basefilm with thickness of 40 μm, and then, the coating film was dried at90° C. oven for 30 seconds and cured by exposing to UV light in acumulative dosage of 40 mJ/cm² under nitrogen atmosphere to obtain ahard coating film with a thickness of 5 μm formed on the PMMA base film.The optical properties, hardness and abrasion resistance of the obtainedhard coating film were determined, and the adhesion between the hardcoating layer and the PMMA base film was also determined. The resultswere shown in table 1.

Example 3: Preparation of the Hard Coating Film

39 weight parts of urethane acrylate oligomer (functionality 9,molecular weight about 2,000, viscosity of about 86,000 cps (at 25° C.),commercially obtained from Allnex, USA), 4.5 weight parts of PETA, 12weight parts of DPHA, 6 weight parts of CTFA, 4 weight parts ofphotoinitiator (Chemcure-481, commercially obtained from Chembridge,Taiwan), 24.5 weight parts of ethyl acetate and 75 weight parts ofn-butyl acetate were mixed and stirred for 1 hour to prepare a hardcoating solution. The hard coating solution was coated on a PMMA basefilm with a thickness of 40 μm, and then, the coating film was dried at90° C. oven for 30 seconds and cured by exposing to UV light in acumulative dosage of 40 mJ/cm² under nitrogen atmosphere to obtain ahard coating film with a thickness of 5 μm formed on the PMMA base film.The optical properties, hardness and abrasion resistance of the obtainedhard coating film were determined and the adhesion between the hardcoating layer and the PMMA base film was also determined. The resultswere shown in table 1

Example 4: Preparation of the Hard Coating Film

39 weight parts of urethane acrylate oligomer (functionality 9,molecular weight about 2,000, viscosity of about 86,000 cps (at 25° C.),commercially obtained from Allnex, USA), 4.5 weight parts of PETA, 12weight parts of DPHA, 6 weight parts of PHEA, 3.5 weight parts ofphotoinitiator (Chemcure-481, commercially obtained from Chembridge,Taiwan), 0.5 weight parts of photoinitiator (TR-PPI-one, commerciallyobtained from Tronly New Electronic Materials, Hong Kong), 24.5 weightparts of ethyl acetate and 75 weight parts of n-butyl acetate were mixedand stirred for 1 hour to prepare a hard coating solution. The hardcoating solution was coated on a PMMA base film with a thickness of 40μm, and then, the coating film was dried at 90° C. oven for 30 secondsand cured by exposing to UV light in a cumulative dosage of 40 mJ/cm²under nitrogen atmosphere to obtain a hard coating film with a thicknessof 5 μm formed on the PMMA base film. The optical properties, hardnessand abrasion resistance of the obtained hard coating film weredetermined and the adhesion between the hard coating layer and the PMMAbase film was also determined. The results were shown in table 1.

Example 5: Preparation of the Hard Coating Film

39 weight parts of urethane acrylate oligomer (functionality 9,molecular weight about 2,000, viscosity of about 86,000 cps (at 25° C.),commercially obtained from Allnex, USA), 4.5 weight parts of PETA, 12weight parts of DPHA, 6 weight parts of HDDA, 3.5 weight parts ofphotoinitiator (Chemcure-481, commercially obtained from Chembridge,Taiwan), 0.5 weight parts of photoinitiator (TR-PPI-one, commerciallyobtained Tronly New Electronic Materials, Hong Kong), 24.5 weight partsof ethyl acetate and 75 weight parts of n-butyl acetate were mixed andstirred for 1 hour to prepare a hard coating solution. The hard coatingsolution was coated on a PMMA base film with a thickness of 40 μm, andthen, the coating film was dried at 90° C. oven for 30 seconds and curedby exposing to UV light in a cumulative dosage of 40 mJ/cm² undernitrogen atmosphere to obtain a hard coating film with a thickness of 5μm formed on the PMMA base film. The optical properties, hardness andabrasion resistance of the obtained hard coating film were determinedand the adhesion between the hard coating layer and the PMMA base filmwas also determined. The results were shown in table 1.

Example 6: Preparation of the Hard Coating Film

40.5 weight parts of urethane acrylate oligomer (functionality 9,molecular weight about 2,000, viscosity of about 86,000 cps (at 25° C.),commercially obtained from Allnex, USA), 4.5 weight parts of PETA, 10.5weight parts of DPHA, 4.5 weight parts of HDDA, 1.5 weight parts ofPHEA, 3.5 weight parts of photoinitiator (Chemcure-481, commerciallyobtained from Chembridge, Taiwan), 5 weight parts of photoinitiator(TR-PPI-one, commercially obtained from Tronly New Electronic Materials,Hong Kong), 24.5 weight parts of ethyl acetate and 75 weight parts ofn-butyl acetate were mixed and stirred for 1 hour to prepare a hardcoating solution. The hard coating solution was coated on a PMMA basefilm with a thickness of 40 μm, and then, the coating film was dried at90° C. oven for 30 seconds and cured by exposing to UV light in acumulative dosage of 40 mJ/cm² under nitrogen atmosphere to obtain ahard coating film with a thickness of 5 μm formed on the PMMA base film.The optical properties, hardness and abrasion resistance of the obtainedhard coating film were determined and the adhesion between the hardcoating layer and the PMMA base film was also determined. The resultswere shown in table 1.

Property Measurement

The optical properties of the hard coating films obtained from theExamples were measured according to JIS test methods, wherein the hazewas measured according to the test method of JIS K7136 by NDH-2000 HazeMeter (manufactured by Nippon Denshoku Industries, Japan), and the lighttransmittance was measured according to the test method of JIS K7361 byNDH-2000 Haze Meter (manufactured by Nippon Denshoku Industries, Japan).

The films obtained from the Examples were conducted the hardnessmeasurement as determined by the pencil hardness test in accordance withJIS K 5400 using Mitsubishi 2H pencils.

The hard coating films obtained from the Examples were conducted theabrasion resistance measurement. The surface of the hard coating filmwas rubbed by a steel wood #0000 with various loads (g/cm²) at a speedof 60 rpm for 10 times. The rubbing load was increased to rub thesurface of the hard coating film. The maximum load with no scratchobserved on the film surface was recorded.

The hard coating films obtained from the Examples were conducted theadhesion test. The adhesion was tested by the cross-cut test accordingto JIS K 5600-5-6 to measure the adhesion between the hard coating andthe PMMA base film.

TABLE 1 The properties of the hard coating films of Examples 1 to 6Light Abrasion Haze Transmittance Resistance (%) (%) Hardness (g)Adhesion Example 1 0.88 92.03 2H 200 100/100 Example 2 0.77 92.06 2H 500100/100 Example 3 0.76 91.94 2H 600 100/100 Example 4 0.81 91.97 2H 400100/100 Example 5 0.80 92.04 2H 900 100/100 Example 6 0.76 92.11 2H 600100/100

As the results shown in Table 1, the hard coating films comprising aPMMA base film obtained from Examples 1 to 6 have excellent adhesionbetween the hard coating layer and the PMMA base film. The hardness andabrasion resistance hard of the hard coating films are all satisfied andthe haze and light transmittance thereof are suitable for displaydevices.

Example 7: Preparation of Anti-Reflective Hard Coating Film

91.25 weight parts of PETA, 8.75 weight parts of photoinitiator(KIP-160, commercially obtained from IGM Resin, Netherland), 45 weightparts of a perfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone (KY-1203, solid content 20%, solvent: methyl isobutylketone, commercially obtained from Shin-Etsu Chemical, Japan), 438weight parts of hollow silica nanoparticles dispersion (Thrulya 4320,solid content 20%, average particle diameter 60 nm, solvent: methylisobutyl ketone, commercially obtained from JGC Catalysts and Chemicals,Japan), 200 weight parts of ethyl acetate, 200 weight parts of n-butylacetate, 3442 weight parts of methyl isobutyl ketone and 5365 weightparts of propylene glycol methyl ether were mixed and stirred for 10minutes to prepare a low refractive solution.

The low refractive solution was coated on the hard coating layer of thehard coating film of Example 3, and then, the coating film was dried at80° C. oven for 2 minutes and cured by exposing to UV light in acumulative dosage of 350 mJ/cm² under nitrogen atmosphere to obtain ahard coating film comprising a low refractive layer with a thickness of0.13 μm formed on the hard coating layer to obtain an anti-reflectivehard coating film.

The optical properties of the obtained anti-reflective hard coating filmwere determined by the measurements as Example 1, wherein the haze wasmeasured as 0.78% and the light transmittance was measured as 94.73%.

This anti-reflective hard coating was determined the reflectivitymeasurement. The obtained anti-reflective hard coating film was adheredto a black sheet and subjected to a reflectivity measurement by means ofa spectrophotometer (model: U-4100, manufactured by Hitachi, Ltd.) atthe wavelength of 380-780 nm, wherein the reflectivity was measured as1.36%.

The anti-reflective hard coating film was also conducted the abrasionresistance measurement. The surface of the low refractive layer of theanti-reflective hard coating film was rubbed by a steel wood #0000 witha load of 500 g/cm² for 10 times and checked if any scratch wasobserved. The surface of the low refractive layer of thisanti-reflective hard coating film was observed no scratches under a rubload of 500 g/cm². The obtained anti-reflective hard coating film hasexcellent abrasion resistance.

Example 8: Preparation of the Anti-Reflective Hard Coating Film

97.75 weight parts of PETA, 2.25 weight parts of photoinitiator(KIP-160, commercially obtained from IGM Resin, Netherland), 45 weightparts of a perfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone (KY-1203, solid content 20%, solvent: methyl isobutylketone, commercially obtained from Shin-Etsu Chemical, Japan), 438weight parts of hollow silica nanoparticles dispersion (Thrulya 4320,solid content 20%, average particle diameter 60 nm, solvent: methylisobutyl ketone, commercially obtained from JGC Catalysts and Chemicals,Japan), 200 weight parts of ethyl acetate, 200 weight parts of n-butylacetate, 3442 weight parts of methyl isobutyl ketone and 5365 weightparts of propylene glycol methyl ether were mixed and stirred for 10minutes for a low refractive solution.

The low refractive solution was coated on the hard coating layer of thehard coating film of Example 5. The coated low refractive layer wasdried at 80° C. oven for 2 minutes and cured by exposing to UV light ina cumulative dosage of 350 mJ/cm² under nitrogen atmosphere. A 0.13 μmlow refractive layer was formed on the anti-reflective hard coatingfilm.

The anti-reflective hard coating film was conducted the opticalproperties measurements as Example 1, wherein the haze was measured as0.84% and the light transmittance was measured as 94.59%.

This anti-reflective hard coating was determined the reflectivitymeasurement. The obtained anti-reflective hard coating film was adheredto a black sheet and subjected to a reflectivity measurement by means ofa spectrophotometer (model: U-4100, manufactured by Hitachi, Ltd.) atthe wavelength of 380-780 nm, wherein the reflectivity was measured as1.38%.

The anti-reflective hard coating film was conducted abrasion resistancemeasurement. The surface of the low refractive layer of theanti-reflective hard coating film was rubbed by a steel wood #0000 witha load of 500 g/cm² for 10 times and checked if any scratch wasobserved. The surface of the low refractive layer of thisanti-reflective hard coating film was observed no scratch under a rubload of 500 g/cm². The obtained anti-reflective hard coating film hasexcellent abrasion resistance.

Example 9: Preparation of the Anti-Reflective Antiglare Hard CoatingFilm

300 weight parts of hard coating solution prepared in Example 4, 5.45weight parts of reactive silica nanoparticles dispersion (MEK-5630X,solid content 30%, solvent: butanone, commercially obtained from EUSIL,Taiwan), 2.55 weight parts of hydrophobic silica nanoparticlesdispersion (NanoBYK-3650, solid content 30%, solvent: propylene glycolmonomethyl ether acetate/propylene glycol methyl ether, commerciallyobtained from BYK, Germany), 3.27 weight parts of organic microparticles(SSX-A02RFE, hydrophilic-modified methyl methacrylate-styrene copolymerparticles, average particle diameter of 2.0 μm, refractive index 1.55,commercially obtained from Sekisui Plastics, Japan), 15.4 weight partsof acrylate leveling agent (BYK-UV3535, solid content 10%, solvent:ethyl acetate, commercially obtained from BYK, Germany), 108.6 weightparts of ethyl acetate and 141.3 weight parts of n-butyl acetate weremixed and stirred for 1 hour to evenly disperse and prepare an antiglarehard coating solution. The antiglare hard coating solution was coated ona PMMA base film with a thickness of 40 μm and then, the coating filmwas dried and cured by exposing to UV light in a cumulative dosage of 89mJ/cm² under nitrogen atmosphere to obtain an antiglare hard coatingfilm with a thickness of 4 μm formed on the PMMA base film.

The haze and light transmittance of the obtained antiglare hard coatingfilm were determined as the tests of Example 1. The results were shownin table 2.

The antiglare hard coating film was conducted glossiness, claritymeasurement and glare evaluation. The glossiness measurement wasconducted by adhering the antiglare hard coating film to a black sheetand measuring the gloss at an angle of 200 by BYK micro-Gloss meteraccording to JIS Z 8741. The clarity measurement was conducted bycutting the antiglare hard coating film into 5×8 cm² and using an imageclarity meter SUGA ICM-IT according to JIS K 7374 to measure the valueat the grating with the width of 0.125 mm, 0.25 mm, 0.50 mm, 1.00 mm and2.00 mm and calculate the total value. Glare evaluation was conducted byadhering the antiglare hard coating film to a black sheet, setting thelaminated film before a fluorescent lamp and visual-observing if thefluorescent image was blurring according to the criteria: “X”: strongglare, “o”: mildly glare, “©”: no glare. The antiglare evaluations ofthe antiglare hard coating film prepared in the Examples were listed inTable 2. Surface roughness test is use the Surface Measuring Instrument(CS-H5000CNC, commercially obtained from Mitutoyo) or 3D microscope(tsurf mobile, commercially obtained from NanoFocus) to determine thearithmetic mean deviation of surface (Ra), the ten-point mean roughness(Rz), the largest peak to valley height (Ry), the mean spacing betweenpeaks (Sm) and the root mean square slope (PΔq). The results were showedin Table 2.

The low refractive solution prepared in Example 7 was coated on theantiglare hard coating layer of the antiglare hard coating film. Thecoated low refractive layer was dried at 80° C. oven for 2 minutes andcured by exposing to UV light in a cumulative dosage of 350 mJ/cm² undernitrogen atmosphere. A low refractive layer with a thickness of 0.13 μmwas formed on the anti-reflective hard coating film to obtain ananti-reflective antiglare hard coating film.

The anti-reflective antiglare hard coating film was conducted the haze,light transmittance, reflectivity, surface roughness measurements as theprevious Examples. The results were listed in Table 3.

The anti-reflective antiglare film was conducted the abrasion resistancemeasurement under the loads of 500 g/cm² and 1000 g/cm². The resultswere listed in Table 3.

Example 10: Preparation of the Anti-Reflective Antiglare Hard CoatingFilm

An antiglare film was prepared by the procedures same as in Example 9,except that the hard coating solution was replaced by the hard coatingsolution of Example 6.

The antiglare hard coating film was conducted the haze, lighttransmittance, glossiness, clarity and surface roughness measurementsand antiglare evaluation. The results were listed in Table 2.

The antiglare hard coating layer of this antiglare hard coating film wasfurther coated with the low refractive layer solution prepared inExample 7 to obtain an anti-reflective antiglare hard coating film. Thisanti-reflective antiglare hard coating film was conducted again asurface roughness measurement, haze and light transmittancemeasurements. The results were listed in Table 3.

The anti-reflective antiglare film was conducted the abrasion resistancemeasurement under the loads of 500 g/cm² and 1000 g/cm². The resultswere listed in Table 3.

Example 11: The Preparation of the Anti-Reflective Antiglare HardCoating Film

300 weight parts of the hard coating solution obtained from Example 6,13.8 weight parts of reactive silica nanoparticles dispersion(MEK-5630X, solid content 30%, solvent: butanone, commercially obtainedfrom EUSIL, Taiwan), 2.46 weight parts of organic microparticles(SSX-A02RFE, hydrophilic-modified methyl methacrylate-styrene copolymerparticles, average particle diameter of 2.0 μm, refractive index 1.55,commercially obtained from Sekisui Plastics, Japan), 15.5 weight partsof re-coatable acrylate leveling agent (BYK-UV3535, solid content 10%,solvent: ethyl acetate, commercially obtained from BYK, Germany), 0.88weight parts of dispersion agent (DisperBYK-2150, solid content 2%,solvent: ethyl acetate/propylene glycol monomethyl ether acetate,commercially obtained from BYK, Germany), 40.5 weight parts of ethylacetate, 70.5 weight parts of n-butyl acetate and 70.5 weight parts ofiso-butyl alcohol were mixed and stirred for 1 hour for evenlydispersion to prepare an antiglare hard coating solution. The antiglarehard coating solution was coated on a PMMA base film with a thickness of40 μm and then, the coating film was dried and cured by exposing to UVlight in a cumulative dosage of 89 mJ/cm² under nitrogen atmosphere toobtain an antiglare hard coating film with a thickness of 4 μm formed onthe PMMA base film.

The obtained antiglare hard coating film was conducted haze, lighttransmittance, glossiness and clarity measurements and glare evaluation.The results were shown in table 2.

The low refractive solution prepared in Example 7 was coated on theantiglare hard coating layer of the antiglare hard coating film toprovide a low refractive layer on the antiglare hard coating layer forpreparing an anti-reflective antiglare hard coating film. Thisanti-reflective antiglare film was conducted the surface roughnessmeasurement, haze and light transmittance measurement. The obtainedresults were listed in Table 3.

The anti-reflective antiglare film was conducted the abrasion resistancemeasurement under the loads of 500 g/cm² and 1000 g/cm². The resultswere listed in Table 3.

Example 12: Preparation of the Anti-Reflective Antiglare Hard CoatingFilm

300 weight parts of the hard coating solution obtained from Example 6,2.73 weight parts of reactive silica nanoparticles dispersion(MEK-5630X, solid content 30%, solvent: butanone, commercially obtainedfrom EUSIL, Taiwan), 2.55 weight parts of hydrophobic silicananoparticles dispersion (NanoBYK-3650, solid content 30%, solvent:propylene glycol monomethyl ether acetate/propylene glycol methyl ether,commercially obtained from BYK, Germany), 3.27 weight parts of organicmicroparticles (SSX-A02RFE, hydrophilic-modified methylmethacrylate-styrene copolymer particles, average particle diameter of2.0 μm, refractive index 1.55, commercially obtained from SekisuiPlastics, Japan), 15.4 weight parts of acrylate leveling agent(BYK-UV3535, solid content 10%, solvent: ethyl acetate, commerciallyobtained from BYK, Germany), 108.7 weight parts of ethyl acetate and141.3 weight parts of n-butyl acetate were mixed and stirred for 1 hourto evenly disperse and prepare an antiglare hard coating solution. Theantiglare hard coating solution was coated on a PMMA base film with athickness of 40 μm and then, the coating film was dried and cured byexposing to UV light in a cumulative dosage of 89 mJ/cm² and anintensity of 380 mW/cm² under nitrogen atmosphere to obtain an antiglarehard coating film with a thickness of 4 μm formed on PMMA base film toobtain an antiglare hard coating film.

The antiglare hard coating film was conducted the glossiness and claritymeasurements, the glare evaluation and the surface roughnessmeasurement. The results were listed in Table 2.

The low refractive solution prepared in Example 7 was coated on theantiglare hard coating layer of the antiglare hard coating film toprovide a low refractive layer on the antiglare hard coating layer forpreparing an anti-reflective antiglare hard coating film. Thisanti-reflective antiglare film was conducted the surface roughnessmeasurement, the haze and light transmittance measurements. The obtainedresults were listed in Table 3.

The anti-reflective antiglare film was conducted the abrasion resistancemeasurement under the loads of 500 g/cm² and 1000 g/cm². The resultswere listed in Table 3.

TABLE 2 The optical properties and surface roughnesses of the antiglarehard coating films obtained from Examples 9 to 12 Light HazeTransmittance Glossiness Clarity Ra Rz Ry Sm (%) (%) @20° (%) (%)Antiglare (μm) (μm) (μm) (μm) PΔq (°) Example 9 3.68 91.82 38.3 430.7 ⊚0.071 0.377 0.533 30.0 1.35 Example 10 3.62 91.89 71.6 430.6 ⊚ 0.0550.427 0.523 33.0 1.38 Example 11 3.03 91.96 71.0 414.8 ⊚ 0.035 0.2420.286 36.2 0.71 Example 12 3.59 91.89 42.5 427.8 ⊚ 0.059 0.277 0.39442.0 0.70

TABLE 3 The optical properties, surface roughnesses and abrasionresistance of the anti-reflective antiglare hard coating films obtainedfrom Examples 9 to 2 Light Abrasion Abrasion Haze Transmittance Ra Rz RySm Resistance Resistance (%) (%) R [%] (μm) (μm) (μm) (μm) 500 g 1000 gExample 9 3.40 94.3 1.27 0.046 0.321 0.218 43.8 ⊚ ⊚ Example 10 3.22 94.71.25 0.049 0.292 0.168 73.7 ⊚ ⊚ Example 11 2.83 94.7 1.32 0.037 0.2400.203 48.1 ⊚ ⊚ Example 12 3.28 94.4 1.28 0.047 0.317 0.198 53.3 ⊚ ⊚

As shown in Tables 1, 2 and 3, the hard coating films, theanti-reflective hard coating films, the antiglare hard coating films andthe anti-reflective antiglare hard coating films of the presentinvention exhibit an excellent adhesion between the hard coating layerand the PMMA base film and good abrasion resistance on the film surfacethereof. The hard coating films, the anti-reflective hard coating films,the antiglare hard coating films and the anti-reflective antiglare hardcoating films of the present invention also exhibit good opticalproperties.

According to the above-disclosed the hard coating film, theanti-reflective hard coating film, the antiglare hard coating film andthe anti-reflective antiglare hard coating film disclosed, the presentinvention is further to provide a polarizer comprising a polarizingelement, wherein the polarizer comprises the present hard coating film,the present anti-reflective hard coating film, the present antiglarehard coating film or the present anti-reflective antiglare hard coatingfilm as above thereon.

According to the above-disclosed the hard coating film, theanti-reflective hard coating film, the antiglare hard coating film andthe anti-reflective antiglare hard coating film disclosed, the presentinvention is yet further to provide a display comprising the polarizercomprises the present hard coating film, the present anti-reflectivehard coating film, the present antiglare hard coating film, the presentanti-reflective antiglare hard coating film, or the present polarizerthereon on the surface of the display.

While the invention has been described by way of example(s) and in termsof the embodiments, it is to be understood that the invention is notlimited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements and procedures, and the scope ofthe appended claims therefore should be accorded the broadestinterpretation so as to encompass all such modifications and similararrangements and procedures.

What is claimed is:
 1. A hard coating film comprising a polymethylmethacrylate (PMMA) base film and a hard coating layer formed thereon,wherein the hard coating layer comprises a (meth)acrylate compositionand an initiator, and the (meth)acrylate composition comprises: aurethane (meth)acrylate oligomer with a functionality of 6 to 15 and themolecular weight thereof ranging between 1,000 and 4,500; at least one(meth)acrylate monomer with a functionality of 3 to 6; and at least one(meth)acrylate monomer with a functionality of less than
 3. 2. The hardcoating film as claimed in claim 1, wherein the (meth)acrylatecomposition comprises: 35 to 50 weight parts of the urethane(meth)acrylate oligomer with a functionality of 6 to 15; 12 to 20 weightparts of the at least one (meth)acrylate monomer with a functionality of3 to 6; and 1.5 to 12 weight parts of the at least one (meth)acrylatemonomer with a functionality of less than
 3. 3. The hard coating film asclaimed in claim 1, wherein the urethane (meth)acrylate oligomer with afunctionality of 6 to 15 is an aliphatic urethane (meth)acrylateoligomer.
 4. The hard coating film as claimed in claim 1, wherein the(meth)acrylate monomer with a functionality of 3 to 6 is selected fromone of the group consisting of pentaerythritol tetra(meth)acrylate,dipentaerythritol penta(meth)acrylate (DPP(M)A), dipentaerythritolhexa(meth)acrylate (DPH(M)A), trimethylolpropane tri(meth)acrylate(TMPT(M)A), ditrimethylolpropane tetra(meth)acrylate (DTMPT(M)A) andpentaerythritol tri(meth)acrylate (PET(M)A), or combinations thereof. 5.The hard coating film as claimed in claim 1, wherein the (meth)acrylatemonomer with a functionality of less than 3 is selected from one of agroup consisting of 2-ethylhexyl (meth)acrylate (2-EH(M)A),2-hydroxyethyl (meth)acrylate (2-HE(M)A), 2-hydroxypropyl (meth)acrylate(2-HP(M)A), 2-hydroxybutyl (meth)acrylate(2-HB(M)A), 2-butoxyethyl(meth)acrylate), 1,6-hexanediol di(meth)acrylate (HDD(M)A), cyclictrimethylolpropane formal (meth)acrylate (CTF(M)A), 2-phenoxyethyl(meth)acrylate (PHE(M)A), tetrahydrofurfuryl (meth)acrylate (THF(M)A),lauryl (meth)acrylate (L(M)A), diethylene glycol di(meth)acrylate(DEGD(M)A), dipropylene glycol di(meth)acrylate (DPGD(M)A), tripropyleneglycol di(meth)acrylate (TPGD(M)A) and isobornyl (meth)acrylate, orcombinations thereof.
 6. The hard coating film as claimed in claim 1,wherein the initiator is selected from at least one of the groupconsisting of acetophenones, diphenylketones, propiophenones,benzophenones, α-hydroxyketones, fluorenylphosphine oxides and the like.7. A hard coating film comprising a polymethyl methacrylate (PMMA) basefilm, a hard coating layer formed thereon and a low refractive layerformed on the hard coating layer, wherein the hard coating layercomprises an initiator and a (meth)acrylate composition comprising: aurethane (meth)acrylate oligomer with a functionality of 6 to 15 and themolecular weight thereof ranging between 1,000 and 4,500; at least one(meth)acrylate monomer with a functionality of 3 to 6; and at least one(meth)acrylate monomer with a functionality of less than 3; wherein thelow refractive layer comprises: a binder resin; a plurality of hollowsilica nanoparticles; an initiator; and a leveling agent comprising aperfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone; wherein the reflectivity of the hard coating film isranging between 1.2% and 1.4%.
 8. The hard coating film as claimed inclaim 7, wherein the perfluoropolyether group-containing(meth)acrylic-modified organosilicone comprises a compound representedby the following formula (I) or a compound represented by the followingformula (II):

wherein b′₁+b′₂ is ranging between 2 and 6.5, and Rf′¹² is representedby the following formula:

wherein n1 is ranging between 2 and
 100. 9. The hard coating film asclaimed in claim 7, wherein the number average molecular weight of theperfluoropolyether group-containing (meth)acrylic-modifiedorganosilicone compound is ranging between 1,500 and 16,000.
 10. Thehard coating film as claimed in claim 7, wherein the amount of theleveling agent comprising perfluoropolyether group-containing(meth)acrylic-modified organosilicone compound is ranging from 5 weightparts to 20 weight parts relative to per 100 weight parts of(meth)acrylate resin.
 11. The hard coating film as claimed in claim 7,wherein the binder resin is selected from at least one of the groupconsisting of pentaerythritol tri(meth)acrylate, dipentaerythritolhexa(meth)acrylate, pentaerythritol tetra(meth)acrylate,dipentaerythritol penta(meth)acrylate, trimethylolpropanetri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate anddipentaerythritol tetra(meth)acrylate, or combinations thereof.
 12. Thehard coating film as claimed in claim 7, wherein the average particlediameter of the hollow silica nanoparticles is ranging between 50 nm and100 nm.
 13. The hard coating film as claimed in claim 7, wherein theamount of the hollow silica nanoparticles is ranging from 60 weightparts to 130 weight parts relative to 100 weight parts of the binderresin.
 14. A hard coating film comprising a polymethyl methacrylate(PMMA) base film and an antiglare hard coating layer formed thereon,wherein the antiglare hard coating layer comprises a (meth)acrylatecomposition, an initiator, silica nanoparticles, organic microparticlesand a leveling agent, wherein the (meth)acrylate composition comprises:a urethane (meth)acrylate oligomer with a functionality of 6 to 15 and amolecular weight ranging between 1,000 and 4,500; at least one(meth)acrylate monomer with a functionality of 3 to 6; and at least one(meth)acrylate monomer with functionality of less than
 3. 15. The hardcoating film as claimed in 14, wherein the surface roughness of the hardcoating film has a mean spacing between peaks (Sm) of between 20 μm and50 μm, an arithmetic mean deviation of surface (Ra) of between 0.03 μmto 0.09 μm, a largest peak to valley height (Ry) of between 0.25 μm and0.60 μm, a ten-point mean roughness (Rz) of between 0.15 μm and 0.50 μmand a root mean square slope (PΔq) of between 0.5° and 1.6°.
 16. Thehard coating film as claimed in 14 further comprising: a low refractivelayer formed on the antiglare hard coating, wherein the low refractivelayer comprises: a binder resin; a plurality of hollow silicananoparticles; an initiator; and a leveling agent; wherein the levelingagent comprises a perfluoropolyether group-containing(meth)acrylic-modified organosilicone; wherein the reflectivity of thehard coating film is ranging between 1.2% and 1.4%.
 17. The hard coatingfilm as claimed in 16, wherein the surface roughness of the hard coatingfilm has a mean spacing between peaks (Sm) of between 20 μm and 90 μm,an arithmetic mean deviation of surface (Ra) of between 0.03 μm and 0.07μm, a largest peak to valley height (Ry) of between 0.15 μm to 0.40 μm,and a ten-point mean roughness (Rz) of between 0.10 μm to 0.50 μm.
 18. Apolarizer comprising a polarizing element, wherein the polarizercomprises a hard coating film comprising a polymethyl methacrylate(PMMA) base film and a hard coating layer formed thereon, wherein thehard coating layer comprises a (meth)acrylate composition and aninitiator, wherein the (meth)acrylate composition comprises: a urethane(meth)acrylate oligomer with a functionality of 6 to 15 and themolecular weight thereof ranging between 1,000 and 4,500; at least one(meth)acrylate monomer with a functionality of 3 to 6; and at least one(meth)acrylate monomer with a functionality of less than
 3. 19. Adisplay comprising a hard coating film comprising a polymethylmethacrylate (PMMA) base film and a hard coating layer formed thereon,wherein the hard coating layer comprises a (meth)acrylate compositionand an initiator, and the (meth)acrylate composition comprises: aurethane (meth)acrylate oligomer with a functionality of 6 to 15 and themolecular weight thereof ranging between 1,000 and 4,500; at least one(meth)acrylate monomer with a functionality of 3 to 6; and at least one(meth)acrylate monomer with a functionality of less than 3.